Automatically adapts to 12V/24V battery voltage, allowing easy use. This product monitors the battery voltage and turns on the circuit. Additionally, when the battery voltage increases to a certain level, it stops charging the battery. Features: The controller solar charging station equipped with two USB ports, supports max 5V/2.5A USB output. This product provides short circuit protection, open circuit protection, reverse protection and overload protection. Perfect and safe to use in various applications, such as home, industry, commercial, etc. The solar controller can clearly indicate the status and data, it can be switching modes and setting parameters conveniently. This product is perfect for le-ad-acid batteries: OPEN, AGM, GEL, not suitable for nickel hydride, lithium ion or other batteries. Using PWM charging management actually improves charging efficiency. Adjustable floating charge voltage, discharge shutdown voltage and discharge reconnection voltage. Features: Material: ABS Item color: blue and black Charging current: 20A, 30A, 40A, 50A, 60A (optional) Charging reconnection: 13V Self-consumption: 10mA USB output: 2-way USB output, 5V 2.5A Operating temperature: -35~+60 Item Size: 125 * 84 mm / 4.92 * 3.31 inch Item Weight: 134g / 4.73 ounce Package size: 135 * 80 * 40mm / 5.31 * 3.15 * 1.57inch Package Weight: 165 g / 5.82 ounces Notes: 1. Make sure your battery has enough voltage for the controllers to recognize the battery type before installation. 2. The battery cable should be as short as possible to minimize losses. 3. The regulator is ONLY suitable for acid batteries: OPEN, AGM, FREEZE. (Not suitable for nickel metal hydride, lithium ion or other batteries) 4. This controller can only use photovoltaic panels as the charging source, DO NOT use direct current or other sufficient power supply as the charging source. Packing List: 1 * solar charge controller